"An op amp has a GBWP of 1MHz. Design a circuit that uses only two of these op amps, to yield a gain of 2, and a BW of 1MHz."
Just started learning about this subject, but I cannot figure this out. With GBWP - the more you increase the gain, the more it cuts the BW right? Even with two of these amplifiers cascaded, is this possible? We were also taught that the "weakest link determines the BW for the circuit." So anything more than a gain of 1 drops the BW below that 1MHz. Can't find anything in the text, the instructor came up with this problem. I assume that this could be a typo, but I won't be able to ask him for a while.
Few things I've tried
-Single Amp
Gain = 2
BW = 1MHz/2 = 500kHz
-2 Amps cascaded
Gain = 2^(1/2)
BW = 1MHz/1.414~ = ~707kHz
Any thoughts?
Just started learning about this subject, but I cannot figure this out. With GBWP - the more you increase the gain, the more it cuts the BW right? Even with two of these amplifiers cascaded, is this possible? We were also taught that the "weakest link determines the BW for the circuit." So anything more than a gain of 1 drops the BW below that 1MHz. Can't find anything in the text, the instructor came up with this problem. I assume that this could be a typo, but I won't be able to ask him for a while.
Few things I've tried
-Single Amp
Gain = 2
BW = 1MHz/2 = 500kHz
-2 Amps cascaded
Gain = 2^(1/2)
BW = 1MHz/1.414~ = ~707kHz
Any thoughts?